Injector



W. B1 MACK.

.(Model.)

INJECTOR.

Patented Oct. 1, 1889.

NVE/"WUR ff fam UN iTnD STATES PATENT Orifice.

NVILLIAM B. MACK, OF BOSTON, MASSACHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 412,032, dated October l, 1889.

Applicaticn filed September 30, 188'?. Renewed Merch 8, 1889. Serial No. 302,587. (Model.)

To all whom it may concern.-

Be it known that l, VILLIAM B. MACK, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Injectors, of which the following is a specification.

This invention has for its object to provide certain improvements in injectors, whereby the starting of the fiow of water and the escape of air and surplus steam and water are facilitated; and to this end it consists in the improvements which Iwill now proceed to describe and claim. j

Of the accompanying drawings, forming a part of this specification, Figure l represents a longitudinal section of an injector provided with my improvement. Fig. 2 represents asection on line .e e', Fig. l. Fig. 3 represents a vlongitudinal section of amodification. Figs. 1i and 5 represcntsections on linesa; andy y, Fig. 1;. and Figf is a cross-sectional view of the delivery-tube7 showing. the overflow-oritices thereof.

The same letters of reference indicate the same parts in all the figures.

In the drawings, a represents the external casing of an injector; and a,the main chamber thereof, and t0 this casing is suitably affixed the steam-cone h. r

d represents a casing forming an inner chamber d within the chamber a', and attached to the casing a either -by being cast therewith or in any other suitable manner. The casing d is shown in Figs. l, et, and 5 as formed entirely within the chamber d/,while in Fig. 3 it is shown as located near one side of the casing a, so that one side ot said casing also forms one side of the chamber cl.

w represents the water-inlet, which communicates through the chamber d' between the inner and outer casings with the combiningcone.

The combining-cone 4 5 and the deliverycone (3 are fitted in the casing d so as to prevent entrance of water into the chamber d from the chamber a', the larger end of the combining-cone being closely iitted to a seat g at one end of the casing d, while the smaller end of the delivery-cone is fitted ,closely in a seator socket h formed in a partition which constitutes one end of the chamber d. The portions of the said cones that enter the seats g h are preferably grooved to receive lead packings 't y1', whereby water-tight joints are formed.

The delivery-cone G has overfiow or vent oriticesj near its delivering end communicating with the chamber d. Said orifices permit the Water to flow readilyoutward under the infinence of back-pressure.

m represents an overflow-passage extendin g from the casing d and chamber d through the outer chamber a' and casing a to conduct away from the injector the waste water and steam escaping through the orifices j.

Vhen steam is first admitted to the combining-cone of an injector, a considerable volume of airis forced by it into the combiningcone before the Water commences to iiowinto said cone. The air and steam so fill the cone at the commencement of the operation that the entrance of the water is considerably retarded. To obviate thisl provide relief-vents j in the combining-cone, at or near the inner end of the abruptly-tapered portion 2 3 of said cone. Said vents, by permitting the escape of air from the combining-cone into the inner chamber d and out through the overfiow, permit the quick introduction of water at the commencement of the operation.

The relief-orifices', formed in the deliverycone, in connection with the vents j in the combining-cone and the chamber d', surrounding the two concs, into which said orifices and vente open, and being separated from the Water entering the injector, enable the injector -to resume its operation more promptly after stoppage than in injectors heretofore made.

The combining-cone is made in two sections et and 5, and the delivery-cone G is made in still another piece or section, which is internally threaded and screwed onto a nipple formed on the section 5. The section -i is reduced at one end and externally threaded to screw into a socket in the section 5.

The air-relief orifices j are formed in the reduced and threaded end of the section 4, and are partly covered by the socket into which said threaded end is screwed, so that by adjusting the section 5 upon the section 4 the size or the relief-critices j can be varied. This adj ustability of the orifices j enables the size of the orifices to be varied to suit dinerent circumstances. The operative size of said IOO other.

orifices is necessarily greater under some circumstances than under others, so that orifices which may be of the proper size in one injector may be too small or too large for an- The adjustable construction enables the same combining-cone t0 be used under all circumstances. y

The improved adjustable combining-cone can be applied to injector-casings which are not provided with the casing d and chamber d. It is obvious, however, that the chamber d is an advantageous adjunct of the air-relief ventsj, since it permits the free escape of air and steam through said vents to the overflow-passage m.

I claiml. In an injector, the combination, with the outer and inner casings,of the combining-cone fitted at its widened end on one end of said inner casing and composed of sections 4 5, the former being provided at its lower end with a reduced threadedportion and with a series of air-vents or relieforifices, and the section 5 having its upper end iitted on said threaded portion and designed to extend over said oriices, substantially as shown and described.

2. An injector having an outer casing a, forming a chamber a', and provided with a steam-cone at its upper end and a water-inlet at its lower end, an inner chamber within, but having no connection with, said outer chamber, an overflow-passage extending from said inner chamber through the outer chamber and casing, and combining and delivery cones fitted in said inner chamber, as described, the combining-cone being provided with air-relieforificesj, and said delivery-cone having water-overiiow orifices, both said oriiices communicating withsaid inner chamber sage, as set forth.

43. The herein-describedimproved injector, comprising the outer casing forming a chamber a', the casing d located Within said charnber and forming an inner chamber having no connection with said former chamber, the combining-cone made in sections 4 5, the seetion at having a lower threaded end and airrelief orices, and the section 5 adj ustably secured on said threaded end and designed to extend over said orifices, the delivery-cone secured to the lower end of said combiningcone and having wateroveriow orifices, and the overflow-passage extending from said inner chamber and casing through said outer chamber and casing, substantiallyT as shown and described, said air and wateroriiices opening into said inn er chamber, as set forth.

4. In an injector, the combination of the two-part casing comprising the outer casing a and the inner casing d, forming inner and outer chambers a d', said inner chamber having no connection with said outer chamber and provided with an overflow-passage m, the

v steam-cone screwed into the end of the outer casing, the combining and delivery cones passing through the inner chamber and having vents communicating directly with the latter and with said overiiow, all arranged and operating substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 17th day of September, A. D. 1887. l

WILLIAM B. MACK. Witnesses:

J. MILLER STEWART, C. F. BROWN. 

